Thursday
January 19, 2017

Posts by anon

Total # Posts: 2,596

American Government
yup, 100% correct. thanks anonymous
November 15, 2016

Physics - Buoyant Force Question
Find the buoyant force on a helium balloon in air (Standard Pressure and Temperature) if the balloon is spherical with diameter 12.0 cm.
November 11, 2016

Physics - Angular Speed Question
A merry-go-round can be modeled as a disk with radius 2.5 meters and mass of 150 kg. For this problem, assume the density is uniform. It is initially rotating at 2.0 rad/sec. Two children of mass 30 kg and 40 kg hop onto the merry-go-round and stay near the edge. What is the ...
November 11, 2016

Physics Question
Find the escape speed from (a) the Sun, (b) a white dwarf star with one solar mass (same as the Sun) and radius 10,000 km, (c) a neutron star of 2.0 solar masses and radius of 10.0 km, and finally (d) a star with 2 solar masses and radius 5930 m. Comment on the speed of part (d).
November 11, 2016

Physics - Tension Question
A uniform bar of mass 12 kg and length 1.4 m is held by a hinge on a vertical wall. A string is attached to the end so that the bar is in mechanical equilibrium. The angle between the bar and the string is 25o. Find the tension in the string.
November 11, 2016

Math
right^^^^
November 9, 2016

MATH
Consider F and C below. F(x, y, z) = 2xz + y2 i + 2xy j + x2 + 15z2 k C: x = t2, y = t + 2, z = 3t ? 1, 0 ? t ? 1 (a) Find a function f such that F = ?f. f(x, y, z) = x2z+xy2+5z3+C Correct: Your answer is correct. (b) Use part (a) to evaluate C ?f · dr along the given ...
November 9, 2016

American Government
B C B
November 7, 2016

Physics - Gravitation
Vesta, a minor planet in the Asteriod Belt between Mars and Jupiter, has a mean radius of 525 km and mass of 2.59 X 10^20 kg. The Dawn Spacecraft (m = 1240 kg) orbited Vesta in 2011 & 2012. How much energy did the spacecraft expend going from the 2750 km orbit to a 210 km ...
November 5, 2016

Physics Gravitation Question
Vesta, a minor planet in the Asteriod Belt between Mars and Jupiter, has a mean radius of 525 km and mass of 2.59 X 10^20 kg. The Dawn Spacecraft (m = 1240 kg) orbited Vesta in 2011 & 2012. A. Find the local acceleration due to gravity at the mean surface of Vesta. What is the...
November 5, 2016

Physics Gravitation Question
Vesta, a minor planet in the Asteriod Belt between Mars and Jupiter, has a mean radius of 525 km and mass of 2.59 X 10^20 kg. The Dawn Spacecraft (m = 1240 kg) orbited Vesta in 2011 & 2012. Find the local acceleration due to gravity at the mean surface of Vesta. What is the ...
November 5, 2016

social studies
it strengthened their resolve to fight
November 4, 2016

social studies
which statement correctly contrast the Lancaster turnpike with the national road 1. the Lancaster turnpike was a longer road 2. the national road required users to pay a toll to use it 3. the national road was a corduroy road 4. the Lancaster turnpike was limited to travel in ...
November 4, 2016

Calc III
Express the volume of the solid that the cylinder r = 4cos(theta) cuts out of the sphere of radius 4 centered at the origin with a triple integral in cylindrical coordinates. I have already found the intervals, but I cannot solve it. The bounds are -sqrt(16-r^2) < z < ...
November 2, 2016

Calc
Find the work done by the force field F(x, y, z) = y + z, x + z, x + y on a particle that moves along the line segment from (1, 0, 0) to (5, 2, 3).
November 1, 2016

Calc
Evaluate the line integral, where C is the given curve. C y^3 ds, C: x = t^3, y = t, 0 ? t ? 2
November 1, 2016

Calc
Evaluate the line integral, where C is the given curve. C z dx + x dy + y dz, C: x = t^4, y = t^5, z = t^4, 0 ? t ? 1
November 1, 2016

la
if you're for connexus academy , lun is correct
November 1, 2016

chemistry
Consider these reactions where M represents a generic metal 1. 2M(s) +6HCl(aq) --> 2MCl3(aq)+3H2(g) (deltaH)= -725.0 kj 2. HCl(g)-->HCl(aq) (deltaH)= -74.8kj 3. H2(g)+CL2(g) --> 2HCl(g) (deltaH)=-1845.0kj 4. MCL3(s) --> MCl3(aq) (deltaH)= -476.0kj Use the ...
October 28, 2016

chemistry
Given these reactions : X(s) + 1/2O2(g) --> XO(s) (Delta)H= -707.7 kj XCO3(s) --> XO(s)+CO2(g) (Delta)H= +381.9kj What is (delta)Hrxm for this reaction? X(s)+1/2 O2(g)+CO2(g) ---> XCO3(s) (Delta)H= ?
October 28, 2016

chemistry
Calculate the standard enthalpy change for the following reaction at 25 °C. H2O+C(graphite)(s) --> H2(g) +CO(g)
October 28, 2016

chemistry
The following equation is the balanced combustion reaction for C6H6: 2C6H6(L) + 15O2(g) --> 12CO2(g)+6H2O(L)+6543 kj If 7.700 g of C6H6 is burned and the heat produced from the burning is added to 5691 g of water at 21 °C, what is the final temperature of the water?
October 28, 2016

chemistry
If the heat of combustion for a specific compound is -1180.0 kJ/mol and its molar mass is 40.91 g/mol, how many grams of this compound must you burn to release 114.50 kJ of heat?
October 28, 2016

chemistry
A 2.50-g sample of powdered zinc is added to 100.0 mL of a 2.00-M aqueous solution of hydrobromic acid in a calorimeter. The total heat capacity of the calorimeter and solution is 448 J/K. The observed increase in temperature is 21.1 K at a constant pressure of one bar. Using ...
October 28, 2016

chemistry
When a 8.00-g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of 3.344 kJ·K–1, the temperature decreases by 0.400 K. Calculate the molar heat of solution of KBr.
October 28, 2016

chemistry
A researcher studying the nutritional value of a new candy places a 4.10-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.47 °C. If the heat capacity of the calorimeter is 33.90 kJ·K–1, ...
October 28, 2016

chemistry
At constant volume, the heat of combustion of a particular compound is –3947.0 kJ/mol. When 1.311 g of this compound (molar mass = 136.58 g/mol) was burned in a bomb calorimeter, the temperature of the calorimeter (including its contents) rose by 4.343 °C. What is the...
October 28, 2016

chemistry
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 7.00 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C? Use CP= 30.8 J/(K·mol) for Na(l) ...
October 28, 2016

chemistry
When 1367 J of heat energy is added to 44.1 g of hexane, C6H14, the temperature increases by 13.7 °C. Calculate the molar heat capacity of C6H14.
October 28, 2016

chemistry
An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 8305 J. What is the specific heat of the gas?
October 28, 2016

chemistry
If you combine 360.0 mL of water at 25.00 °C and 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.
October 28, 2016

Social Studies
Mongoose is right
October 28, 2016

Chemistry
Draw the product(s) of the following reaction CH3-CH2-C(triple bond)C-CH2 ---------> ? (Na/NH3)
October 27, 2016

Calc
Use spherical coordinates. Evaluate Triple integral SSSE where E lies between the spheres x^2 + y^2 + z^2 = 25 and x^2 + y^2 + z^2 = 49 in the first octant.
October 26, 2016

math
Change from rectangular to cylindrical coordinates. (Let r ≥ 0 and 0 ≤ θ ≤ 2π.) (a) (3, −3, 2) (b) (−2, −2sqrt3, 5)
October 26, 2016

calc
Write the equations in cylindrical coordinates. (a) 3z = 2x^2 + 2y^2 (b) 7x^2 + 7y^2 = 4y
October 25, 2016

Calc
Find the rectangular coordinates of the point, whose cylindrical coordinates are given. (a) (4, π/4, 1) (x, y, z) = (b) (6, −π/3, 5) (x, y, z) =
October 25, 2016

Calc
Change from rectangular to cylindrical coordinates. (Let r ≥ 0 and 0 ≤ θ ≤ 2π.) (a) (3, −3, 2) (b) (−2, −2sqrt3, 5)
October 25, 2016

Calc
Write the equations in cylindrical coordinates. (a) 3z = 2x^2 + 2y^2 (b) 7x^2 + 7y^2 = 4y
October 25, 2016

CALC
Find the rectangular coordinates of the point, whose cylindrical coordinates are given. (a) (4, π/4, 1) (x, y, z) = (b) (6, −π/3, 5) (x, y, z) =
October 25, 2016

Math
Cheater! Do your own math. Cheating = Lazy. Work hard!
October 20, 2016

Social Studies
WRONG. Alexandria is wrong! Answers: 2. B 3. D I don't know the first answer though.
October 20, 2016

Math
Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + y^2 = 9 and the planes y + z = 19 and z = 2.
October 19, 2016

Math
Use a triple integral to find the volume of the given solid. The tetrahedron enclosed by the coordinate planes and the plane 8x + y + z = 4
October 19, 2016

Math
Find center of mass of the lamina that occupies the region D and has the given density function ρ. D is the triangular region with vertices (0, 0), (2, 1), (0, 3); ρ(x, y) = 5(x + y) mass=30 Find center of mass
October 19, 2016

math
what is the solution to the following system? -2x-y=1 -4x-2y=-1
October 19, 2016

CALC
Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + y^2 = 9 and the planes y + z = 19 and z = 2.
October 19, 2016

CALC
Use a triple integral to find the volume of the given solid. The tetrahedron enclosed by the coordinate planes and the plane 8x + y + z = 4
October 19, 2016

SOCIAL STUDIES (CHECK answer)
MS sue how does saying i agree help anyone
October 19, 2016

Calc
Find the mass and center of mass of the solid E with the given density function ρ. E is bounded by the parabolic cylinder z = 1 − y^2 and the planes x + 6z = 6, x = 0, and z = 0; ρ(x, y, z) = 4. m=? x, y, z=?
October 19, 2016

Calc
Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + y^2 = 9 and the planes y + z = 19 and z = 2.
October 19, 2016

math
why do you need to tell everybody their location??? that makes no sense at all
October 18, 2016

Calc
Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + y^2 = 9 and the planes y + z = 19 and z = 2.
October 18, 2016

Calc
Use a triple integral to find the volume of the given solid. The tetrahedron enclosed by the coordinate planes and the plane 8x + y + z = 4
October 18, 2016

Calc
Evaluate the triple integral. SSS(triple integral T 3x^2 dV where T is the solid tetrahedron with vertices (0, 0, 0), (1, 0, 0), (0, 1, 0), and (0, 0, 1)
October 18, 2016

Calc
Evaluate the following integral using three different orders of integration. *triple integral E (xz − y3) dV, where E = (x, y, z) |  −1 ≤ x ≤ 3, 0 ≤ y ≤ 4, 0 ≤ z ≤ 3
October 18, 2016

Calc
Find the mass and center of mass of the lamina that occupies the region D and has the given density function ρ. D is the triangular region with vertices (0, 0), (2, 1), (0, 3); ρ(x, y) = 5(x + y) m=? (x,y)=?
October 18, 2016

CALC
Its wrong.
October 18, 2016

Thermochemistry
The given reaction was: 2C6H6(l)+15O2(g)=12CO2(g)+6H2O(g) dH rxn= -6278kJ
October 17, 2016

Thermochemistry
What volume of benzene (C6H6, d= 0.88g/ml, molar mass= 78.11g/mol) is required to produce 1.5x10^3 kJ of heat according to the following reaction? I just can't figure out what equation to use to solve this. Help, please?
October 17, 2016

Physics Force and Friction question
A crate of mass 100kg is at rest on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.3. A horizontal force, F, or magnitude 350N is applied to the crate. Which of the following is true? ...
October 16, 2016

Physics
You are in an elevator that is accelerating upwards at 2m/s^2. If your mass is 70kg, what is the normal force pushing on you by the floor of the elevator? A. 70N B. 690N C. 830N Please give the correct answer and an explanation as to why its correct.
October 14, 2016

Physics
A crate of mass 100kg is at rest on a horizontal floor. The coefficient of static friction between the crate and the floor is 0.4, and the coefficient of kinetic friction is 0.3. A horizontal force, F, or magnitude 350N is applied to the crate. Which of the following is true? ...
October 14, 2016

Physics
Multiple Choice. If all of the forces acting on an object an object are balanced (net force is zero), then: a. The object's speed will decrease b. The object's direction of motion can change, but its speed cannot C. The object is ecperiencing zero acceleration Please ...
October 14, 2016

Physics
Why is the joule-second (J*s) equivalent to kg*m^2/s ?
October 14, 2016

physics
A stone is thrown vertically upward at 23 m/s. How fast is it moving when it reaches 14 m?
October 13, 2016

Social Studies
Okay thank you so much!
October 13, 2016

Social Studies
Why did the Western Roman Empire fall? Thank you for helping me!
October 13, 2016

Social Studies
Okay thank you so much I really really appreciate it!
October 13, 2016

Social Studies
How might Greece's psychical features have affected the development of Greek trade, culture, and legacy? Thank you for the help
October 13, 2016

Social Studies
Okay, thank you so much, have a nice day/night!
October 13, 2016

Social Studies
______Introduced Europeans to Muslim inventions, such as the astrolabe that helped sailors navigate the seas. A) The Crusades(I pick this) B) The Reconquista C) The Vikings D) The Magna Carta Thank you for helping me!
October 13, 2016

physics grade 11
how do i figure out how fast a car is going when all i know is frequency?
October 13, 2016

Math. please help
-1/2 + 1/3 = Adding and subtracting fractions with rational numbers.
October 12, 2016

History
thx Sarah :)
October 11, 2016

Calc
Evaluate the integral by reversing the order of integration. (2 integrals) 0 to 8 cube root(y) to 2 8e^(x^4) dx dy
October 11, 2016

Calc
Evaluate the integral by reversing the order of integration. (2 integrations) 0 to 1 sqrt(x) to 1 8(y^3+1) dy dx
October 11, 2016

Calc
Evaluate the integral by reversing the order of integration.(2 integrals) 0 to 4 5ex2 dx dy 3y to 12
October 11, 2016

Calculus
Find the volume of the solid under the plane 3x + 3y − z = 0 and above the region bounded by y = x and y = x^4
October 11, 2016

Calculus
Find the volume of the given solid. Under the surface z = 7xy and above the triangle with vertices (1, 1), (4, 1), and (1, 2)
October 11, 2016

HELP ME PLEASE I NEED HELP history
Why did Congress decide the election of 1800? Select two a. based on the outcome, it was mandated by the us consitutuion *** b. the popular vote was a tie c. no candidate won the electoral vote d: not enough citizens voted to determine the outcome ***
October 10, 2016

SOCIAL STUDIES (CHECK ANSWERS PLEASE)
do you know if #6 is right have you submitted it yet
October 7, 2016

SOCIAL STUDIES (CHECK ANSWERS PLEASE)
im stuck on this also do you know any of the answers pls answer
October 7, 2016

Physics (PLEASE HELP PRONTO)
A cart with a mass of 5.35 kg is placed on a frictionless ramp at an angle of 14.2. The cart is released and rolls down the ramp. Find the acceleration.
October 7, 2016

C++
It won't compile because it's saying the second "else if" isn't valid. I have tried changing things around and the best I can get is when I enter a value starting with"A" it returns nothing and a value starting with "B" returns and ...
October 6, 2016

C++
I am trying to create a program that displays shipping charges for two region codes. The region code has to have exactly 3 characters (the letter A or B followed by two numbers). Display a message if invalid region code is entered. use a sentinel value to exit program. ...
October 6, 2016

science
we need to see the answers
October 6, 2016

art
Please link the art or I cannot help you.
October 5, 2016

Social Studies
Were these answers right????
October 3, 2016

Health
Lyssey likes to bully others here and she is wrong. Your answers aren't all wrong.
October 3, 2016

Math
thank you so much!
October 3, 2016

Math
oh wait!! is it 9?!
October 3, 2016

Math
[(8^2 - 4) - 6] / 6 = ?? i think it's 59?? idk what the brackets mean. can someone PLEASE explain this to me???
October 3, 2016

Physics
A 300kg bobsled starts down an icy slope inclined at 12 degrees. There is some friction between the bobsled and the slope. If the hill is 200m long, how long does it take for the sled to reach the bottom?
October 2, 2016

Physics
A 300kg bobsled starts down an icy slope inclined at 12 degrees. There is some friction between the bobsled and the slope. Write the equations of motion in the two directions where the x axis is along the hillside.
October 2, 2016

English
yea i need help on this too someone help
September 30, 2016

American Government
can confirm, it is C
September 29, 2016

Social Studies
what was the flaw in the act passed by congress that established a tax on whiskey? a. it rewarded farmers who grew corn b. it did not spread the tax burden evenly** c. it was similar to taxes britan had proposed d. it had to be collected in person by tax collectors
September 29, 2016

world history
omg 100%
September 28, 2016

Math please help!!!
Julia is allowed to watch no more than 5 hours of television a week. So far this week, she has watched 1.5 hours. Write and solve an inequality to show how many hours of television Julia can still watch this week.
September 26, 2016

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